This weekend sees the 4th anniversary of the 4am Project, which has been photographing the world at 4 AM since 2009. It's produced some great images in that time, from a very simple concept that aims to show the world at a time of day when few are around to look at it. If you're excited by the idea of photographing your own location at 04:00h on April 14th check out the project here. If you're in Birmingham UK, you might be lucky enough to be one of 20 photographers accompanying project founder Karen Strunks to photograph The Bullring centre, so be quick.

For a look at some of the images produced over the project's four year history, head over to Flickr.